Targum su Salmi 121:78

The song that is said on the ascents from the abyss. I raise up my eyes to the mountains — from where comes my help?

My help is from before Adonai, who made the heaven and earth.

He will not make your feet totter, unsleeping is your Guardian.

Behold — unsleeping and unresting is the guardian of Israel.

Adonai will guard you. Adonai will cast shade upon you on account of the mezuzah that is affixed to the right side of your entrance.

In the day, when the sun rules, the zephyrs will not strike you; nor the lilin, when the moon rules in the night.

The word of Adonai will guard you from all evil, will guard your soul.

Adonai will guard your going out to business and your going in to engage in Torah from now and until forever.